The hazes or shadows in the mesh after decoating the stencil materials are predominantely caused by ink – as well as emulsion residues. They can cause a chemical reaction, resulting in particles surrounding the polyester thread and producing the haze effect. A manual process using specialty chemicals, so-called haze removers, generally remove such screen hazes. To avoid screen hazes we recommend special screen cleaner formulas.
VARIOHAZE 8068 / FOTECHEM 2080
VARIOHAZE 8068 / FOTECHEM 2080 is a highly active and solvent-free cleaning paste, which contains mild etching alkalines and biodegradable tensides. This paste is a perfect medium to remove ink and screen emulsion stains (hazes) on all types of mesh. At the same time the paste degreases the mesh and therefore serves as a mesh regenerator. The product also helps to avoid a deterioration of the print quality and avoids adhesion problems of subsequent stencil re-coating.
VARIOHAZE 8105 / FOTECHEM 2091
VARIOHAZE 8105 / FOTECHEM 2091 is a highly reactive haze removing fluid with alkaline reaction. The oxidizing component is active chlorine (hypochlorit). The fluid viscosity of the product assures prefect mesh bridging and wetting. The screen has to remain still at room temperature until the product is completely dry and crystalline particles appear. This happens best by storing the treated screen over night at a temperature of max. 25°C.
VARIOHAZE 8902 / FOTECHEM 2089
VARIOHAZE 8902 / FOTECHEM 2089 is a highly reactive haze removing gel with a strong alkaline reaction. Due to its alkaline content the product also serves as a perfect screen degreaser. The gel is applied with a coating trough, preferable from both sides of the completely dried screen, to produce a thin and even layer of haze remover. Following a reaction time act of maximum 5 – 10 minutes at room temperature rinse the screen from bottom to the top with high pressure water.
VARIOHAZE 8905 / FOTECHEM 80905
VARIOHAZE 8905 removing gel has similar characteristics to VARIOHAZE 8902 and is used in the same way. Please follow the instructions for use in the technical data sheet.
This slowly evaporting and ready-to-use screen cleaning medium developed by FOTECO helps to avoid screen hazes. The biodegradable product is used as a post-cleaner after the screen is reclaimed and prior hazes are removed.
VARIOCLEAN S 4306
Screen cleaner with dual function: this slowly evaporting, biodegradable and ready-to-use screen cleaner developed by REMCO helps to avoid screen hazes. The product is also suitable to clean the screen completely during and after printing and is used as a post-cleaner after the screen is reclaimed and prior hazes are removed. Additionally 4306 is an activator of VARIOHAZE 8105. After complete drying 4306 is applied with trough, brush or pad. After the reaction time flush the screen with high pressure water.